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WO2025041428A1 - Système d'électrolyse de l'eau et dispositif de commande de système d'électrolyse de l'eau - Google Patents

Système d'électrolyse de l'eau et dispositif de commande de système d'électrolyse de l'eau Download PDF

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Publication number
WO2025041428A1
WO2025041428A1 PCT/JP2024/022390 JP2024022390W WO2025041428A1 WO 2025041428 A1 WO2025041428 A1 WO 2025041428A1 JP 2024022390 W JP2024022390 W JP 2024022390W WO 2025041428 A1 WO2025041428 A1 WO 2025041428A1
Authority
WO
WIPO (PCT)
Prior art keywords
power consumption
electrolytic cell
water
power
water electrolysis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/022390
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English (en)
Japanese (ja)
Inventor
章 軍司
貴彰 水上
智道 伊藤
敬司 渡邉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of WO2025041428A1 publication Critical patent/WO2025041428A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J15/00—Systems for storing electric energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/12—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

Definitions

  • the present invention relates to a water electrolysis system and a water electrolysis system control device that detects the grid frequency and changes the power consumption.
  • hydrogen is a clean energy source that does not emit carbon dioxide when burned. For this reason, it has attracted attention as one of the clean energy sources for combating global warming, and technological development is underway regarding the production, transportation, and use of hydrogen.
  • One method of producing hydrogen is the water electrolysis system.
  • renewable energy In order to produce clean hydrogen, renewable energy is necessary as an energy source. Renewable energy sources such as solar and wind power have large fluctuations in the amount of power generated over time, and as the amount of power generated increases, an adjustment capability is required to adjust the balance between power supply and demand. As a result, it has been proposed to adjust the power consumption of water electrolysis systems to provide this adjustment capability.
  • Patent Document 1 describes an output control device that controls the output of an electrolysis device within the range of rated output or maximum output based on commands to adjust power demand over a time period of about 2-3 minutes to several hours, or based on changes in system frequency to adjust power demand over a time period of about several seconds to several tens of seconds.
  • Patent Document 2 describes a hydrogen supply system, hydrogen station, and hydrogen supply and demand management method that adjusts the power consumption of an electrolysis device based on commands for adjusting the power supply and demand of a commercial power grid, and determines the amount of adjustment based on factors such as the adjustment margin calculated from the difference between the maximum and minimum rated power of the electrolysis device and the current operating output, the remaining amount of hydrogen, and the future supply and demand balance.
  • the present invention aims to prevent deterioration and breakdown of the electrolytic cell by calculating the appropriate adjustment margin that the electrolytic cell can instantly respond to in a water electrolysis system that detects the grid frequency and changes the power consumption to rapidly change the power consumption.
  • the present invention aims to suppress deterioration and failure of the electrolytic device due to rapid changes in power consumption, even in a system in which multiple electrolytic cells are electrically connected in series and parallel and the power consumption of each cell cannot be controlled individually.
  • the present invention provides a water electrolysis system that includes a rectifier that converts AC power from a power system into DC power, an electrolytic cell that performs water electrolysis using the DC power from the rectifier, a gas-liquid separator that separates oxygen and hydrogen from a mixed fluid of oxygen and water from the electrolytic cell, and a cooling system that supplies water to the electrolytic cell, the rectifier being controlled to adjust power consumption in accordance with the frequency of the power system, the adjustment being made to adjust power consumption so that it falls within a power consumption limit range in the electrolytic cell, and the power consumption limit range being determined from the temperature of the electrolytic cell, the deterioration rate, the pressure of the water at the outlet of the electrolytic cell, and the flow rate of supplied water.
  • the present invention also provides a water electrolysis system control device comprising: a rectifier that converts AC power from a power system into DC power; an electrolytic cell that performs water electrolysis using the DC power from the rectifier; a gas-liquid separator that separates oxygen and hydrogen from a mixed fluid of oxygen and water from the electrolytic cell; and a cooling system that supplies water to the electrolytic cell, the control device controlling the rectifier to adjust power consumption according to the frequency of the power system, adjusting the power consumption so that it is within a power consumption limit range in the electrolytic cell, and determining the power consumption limit range from the temperature of the electrolytic cell, the deterioration rate, the water pressure at the outlet of the electrolytic cell, and the supply water flow rate.
  • the system lower limit current density was set to 0.4 A/ cm2
  • the upper limit current density was set to 2.25 A/ cm2
  • the upper limit heat generation amount was set to 1.25 W/ cm2
  • the upper limit cell voltage was set to 1.95 V.
  • the current upper limit calculation unit 104 set the upper limit current so that the oxygen volume ratio was 70% or less
  • the heat generation amount upper limit calculation unit 105 set the upper limit heat generation amount so that the inlet/outlet temperature difference was 5°C or less.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Metallurgy (AREA)
  • Power Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Combustion & Propulsion (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

L'invention concerne un système d'électrolyse de l'eau qui modifie la consommation d'énergie en détectant une fréquence du système pour modifier rapidement la consommation d'énergie, une marge de réglage appropriée qui peut être adaptée instantanément par une cellule électrolytique étant calculée de façon à supprimer la détérioration ou la défaillance de la cellule électrolytique. Le système d'électrolyse de l'eau selon la présente invention est conçu en comprenant : un redresseur qui convertit une puissance en courant alternatif d'un système d'alimentation en une puissance en courant continu ; une cuve d'électrolyse qui effectue une électrolyse de l'eau à l'aide de la puissance en courant continu provenant du redresseur ; un séparateur gaz-liquide qui effectue une séparation gaz-liquide de l'oxygène et de l'hydrogène à partir d'un fluide qui est un mélange d'oxygène et d'eau provenant de la cellule électrolytique ; et un système de refroidissement qui fournit de l'eau à la cellule électrolytique. Le système d'électrolyse de l'eau est caractérisé en ce que : le redresseur est commandé de manière à ajuster la consommation d'énergie en fonction de la fréquence du système d'alimentation ; la consommation d'énergie est ajustée de telle sorte que la consommation d'énergie dans la cellule électrolytique se trouve dans une plage limitée pour la consommation d'énergie ; et la plage limitée pour la consommation d'énergie est déterminée sur la base de la température et du taux de détérioration de la cellule électrolytique, de la pression de l'eau à une sortie de la cellule électrolytique, et du débit de l'eau fournie.
PCT/JP2024/022390 2023-08-23 2024-06-20 Système d'électrolyse de l'eau et dispositif de commande de système d'électrolyse de l'eau Pending WO2025041428A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023-135675 2023-08-23
JP2023135675A JP2025030402A (ja) 2023-08-23 2023-08-23 水電解システム並びに水電解システム制御装置

Publications (1)

Publication Number Publication Date
WO2025041428A1 true WO2025041428A1 (fr) 2025-02-27

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PCT/JP2024/022390 Pending WO2025041428A1 (fr) 2023-08-23 2024-06-20 Système d'électrolyse de l'eau et dispositif de commande de système d'électrolyse de l'eau

Country Status (2)

Country Link
JP (1) JP2025030402A (fr)
WO (1) WO2025041428A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120719340A (zh) * 2025-08-15 2025-09-30 鄂尔多斯市国盛利华制氢设备有限公司 一种水电解制氢装置控制系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018182004A1 (fr) * 2017-03-31 2018-10-04 旭化成株式会社 Élément multipolaire de type collecteur externe, cellule électrolytique multipolaire de type collecteur externe et procédé de production d'hydrogène
JP2018193573A (ja) * 2017-05-15 2018-12-06 株式会社東芝 電解液タンク、電解装置、および水素製造システム
JP2019183259A (ja) * 2018-04-04 2019-10-24 パナソニックＩｐマネジメント株式会社 水素供給システム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018182004A1 (fr) * 2017-03-31 2018-10-04 旭化成株式会社 Élément multipolaire de type collecteur externe, cellule électrolytique multipolaire de type collecteur externe et procédé de production d'hydrogène
JP2018193573A (ja) * 2017-05-15 2018-12-06 株式会社東芝 電解液タンク、電解装置、および水素製造システム
JP2019183259A (ja) * 2018-04-04 2019-10-24 パナソニックＩｐマネジメント株式会社 水素供給システム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120719340A (zh) * 2025-08-15 2025-09-30 鄂尔多斯市国盛利华制氢设备有限公司 一种水电解制氢装置控制系统

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